code po404 on 2008 Dodge Grand Caravan

changed o2 sensor got advice from other web site.po404 list egr valve.does it need cleaning or replacement

by in Little River, SC on July 03, 2014
1 answer
ANSWER by on September 24, 2014
You can clean it. I clean mine 1 time per year for same code.
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it won't go above 50mph. Downhill it does fine. It shows two codes: po404 and po325. What could be wrong?

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